Tableau Software has created an interactive table/graph that examines data rates for the iPad, carrier-by-carrier. The results are interesting. As you might expect, data rates from AT&T in the US are near the top of the list, but those unlucky souls in France have to pay twice what AT&T users do. Residents of Singapore may not be allowed to chew gum, but they can pay as little as $.51 per Gigabyte for wireless data.